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2008 Feb 23
3
using subset() in data frame
R folks,
As an R novice, I struggle with the mystery of subsetting. Textbook and
online examples of this seem quite straightforward yet I cannot get my
mind around it. For practice, I'm using the code in MASS Ch. 6,
"whiteside data" to analyze a different data set with similar variables
and structure.
Here is my data frame:
###subset one of three cases for the variable